JP3090545U - Electric tricycle - Google Patents

Abstract

(57) [Problem] To provide an electric tricycle with reduced manufacturing cost, excellent ride comfort, and good operability. A driving wheel connected to a vehicle body, a steering shaft connected to a front side of the vehicle body, and a lower end of the steering shaft, and steered by operating a handle provided at an upper end of the steering shaft.
And two driven wheels 10a, 1 connected to the rear side of the vehicle body.
0b, an electric drive device for transmitting rotational driving force to drive wheels, and a seating seat 16 disposed on a vehicle body with a seat support 14 interposed therebetween. The vehicle body 4 is formed of a frame having a hollow pipe as a main member. Further, the seat support portion 14 is also formed of a frame body of a hollow pipe formed to have a substantially U shape when viewed from the side of the vehicle body.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an electric tricycle that can be safely driven on the road with a small amount of labor and comfortable operability even when used by people who have difficulty walking.

[0002]

[Prior art]

 In recent years, care for the elderly and the physically handicapped has become an increasingly important environment. In particular, it is important for people with physical disabilities to secure transportation. One of the means of transportation is a wheelchair. Wheelchairs are designed so that people with disabilities who have lost their ability to walk can run by turning their wheels with their own strength. On the other hand, various electric vehicles have been developed as devices that can run for the elderly and the sick, who lack physical strength.

[0003] For example, a medical electric tricycle described in Utility Model Registration No. 3083499 has one driven front wheel connected to the front side of a vehicle body, and the driven front wheel is connected to a steering shaft provided with a steering wheel. Two drive rear wheels are connected to the rear side. Also, two batteries and an electric motor are mounted on the rear side of the vehicle body. The elderly and the sick are seated on the seats provided on the vehicle body, and the steering wheel is operated by rotating the driving rear wheel by the rotation of the electric motor supplied by the power supply from the power storage device. It allows the driver to run in any direction while driving.

[0004]

[Problems to be solved by the invention]

 However, the body of the electric tricycle for medical use described in Utility Model Registration No. 3083499 is formed using a frame or panel material using a plurality of rectangular frames having a large cross-sectional area, and is required to accommodate a charger. The large storage area is also arranged, so the vehicle has a heavy structure. As described above, when the body weight is heavy, the rotational driving force of the driving rear wheel must be increased, the capacity of the capacitor must be increased (two capacitors), and a large electric motor must be used. Therefore, the manufacturing cost increases.

In view of the above, the present invention has been made in view of the above circumstances, and by reducing the weight of the vehicle body and miniaturizing the electric drive device, the manufacturing cost has been reduced, and the driving comfort has been improved. It aims to provide an electric tricycle with good performance at a low price.

[0006]

[Means for Solving the Problems]

 Therefore, the electric three-wheeled vehicle according to the first aspect of the present invention includes a vehicle body, a steering shaft connected to a front side of the vehicle body, and a steering wheel connected to a lower end of the steering shaft and provided at an upper end of the steering shaft. One drive wheel to be steered by the vehicle, two driven wheels connected to the rear side of the vehicle body, an electric drive device for transmitting a rotational driving force to the drive wheel, and a seat support portion on the vehicle body. In the electric three-wheeled vehicle provided with the seating seat arranged in the above-mentioned manner, the vehicle body is formed of a frame frame mainly including a hollow pipe.

According to a second aspect of the present invention, in the electric three-wheeled vehicle according to the first aspect, the sheet support portion is a hollow pipe formed to have a substantially U shape when viewed from a side of the vehicle body. It is formed of a frame, and is detachably fixed between the vehicle body and the seat. According to a third aspect of the present invention, in the electric tricycle according to the first aspect, the seat support portion is fixed such that a U-shaped opening when viewed from the side of the vehicle faces forward of the vehicle body. ing.

[0008]

[Embodiment of the invention]

 Hereinafter, an embodiment of an electric tricycle according to the present invention will be described with reference to the drawings. FIG. 1 shows an appearance of an electric tricycle 2 of the present embodiment. The electric tricycle 2 of the present embodiment includes a vehicle body 4, a steering shaft 6 connected to the front side of the vehicle body 4, one drive wheel 8 connected to a lower portion of the steering shaft 6, and a rear side connected to the vehicle body 4. The vehicle includes four driven wheels 10 a and 10 b, an electric driving device for transmitting rotational driving force to the driving wheels 8, and a seat 16 fixed on the vehicle body 4 via a seat support 14.

The steering shaft 6 is rotatably supported by a bearing member 18 fixed to the front side of the vehicle body 4. A handle 20 is fixed to the upper end of the steering shaft 6, and a U-shaped wheel support member 22 is fixed to the lower end, and the rotating shaft of the drive wheel 8 is supported by the wheel support member 22. The electric drive device described above includes an electric motor 24 fixed to the steering shaft 6, a capacitor 26 for supplying an alternating current to the electric motor 24 via an inverter (not shown), and a rotating shaft of the electric motor 24. An endless chain 28 is bridged between the gear 24a directly connected to the gear 8a and the gear 8a directly connected to the rotation shaft of the drive wheel 8.

The handle 20 is a handle formed in a ring shape so that the driver can easily grasp it, in which a light L and a bell B are installed, and an output lever S for changing the output of the electric motor 24 is arranged. ing. Further, the seat 16 includes a seat 16a detachably fixed on the seat support 14, a backrest 16c detachably fixed to the seat support 14 via a connection pipe 16b, An armrest 16d rotatably connected to the backrest 16c is formed of a wooden material except for the connecting pipe 16b.

The members indicated by reference numerals 28 and 30 are windshield and safety covers made of a resin plate. Here, FIG. 2 is a side view showing the configuration of the vehicle body 4 and the seat support portion 14 of the present embodiment, and FIG. 3 is a plan view. The vehicle body 4 is formed of a frame body mainly including side members 4a and 4b formed of hollow pipes, a front cross member 4c, and a rear cross member 4d. That is, in the vehicle body 4, the side members 4a and 4b are separated from each other in the vehicle body width direction and extend in the front-rear direction of the vehicle body. The front cross member 4c extends from the side members 4a and 4b from the front side of the vehicle body and then extends in the vehicle body width direction to connect the side members 4a and 4b. The rear cross member 4d connects the side members 4a, 4a to the rear side of the vehicle body.

Two sub-members 4e and 4f are fixed between the side members 4a and 4b, and are provided between a central portion of the sub-member 4e located on the front side of the vehicle body and a central portion of the rear cross member 4d. , A center member 4g is fixed. A step plate 29 (see FIG. 1) is disposed between the side members 4a and 4b and supported by the sub-member 4e and the center member 4g from below.

[0013] Support members 32a and 32b made of angle members are also fixed between the sub-member 4f located on the rear side of the vehicle body and the rear cross member 4d. The axles 10c of the two driven wheels 10a and 10b are rotatably supported on the support members 32a and 32b, and the electric storage device 26 constituting the electric drive device is mounted. On the other hand, the seat support portion 14 is also formed of a frame body made of a hollow pipe, and has a substantially U-shape so that the opening 15 faces the front of the vehicle when viewed from the vehicle body side as shown in FIG. It is a formed member. That is, the seat support portions 14 are separated from each other in the vehicle width direction and are bolted to the support members 32a and 323b, and the upper frames 14a and 14b are folded upward from the rear side of the vehicle body of the lower frames 14a and 14b. The bent side frames 14c and 14d, the upper frames 14e and 14f bent from the upper portions of the side frames 14c and 14d toward the front of the vehicle body, and the vehicle body of these upper frames 14e and 14f. And a cross frame 14g that connects the front side and extends in the vehicle width direction. Here, the upper frames 14e and 14f and the cross frame 14g are fixed to the seat 16a by bolts.

As described above, according to the electric tricycle 2 having the above configuration, the vehicle body 4 is formed by the frame members (the side members 4a and 4b, the front cross member 4c, and the rear cross member 4d) formed of the hollow pipe, and the seat is supported. Since the part 14 is also formed of a frame body made of a hollow pipe, the vehicle body has a light weight structure. As described above, when the vehicle weight is light, the rotational driving force of the drive wheel 8 can be small, so that the capacity of the battery 26 is reduced (one battery 26), and the electric motor 24 is also a small device. Moreover, the electric three-wheeled vehicle 2 of the present embodiment can be easily assembled because there are few places requiring skill in the assembling operation and most of the connecting portions are bolted. Therefore, since the vehicle body 4, the seat support portion 14, and the seat 16 have a simple structure, and the assembling work is also easy, the electric tricycle 2 with a reduced manufacturing cost can be provided. .

When an alternating current is supplied from the battery 26 to the electric motor 24 via the inverter, the rotation of the electric motor 24 is transmitted from the gear 24 a to the gear 8 a via the endless chain 28 to drive the electric motor 24. By rotating the wheel 8 and operating the steering wheel 20 by the driver, the driver can travel in a free direction while sufficiently making a small turn peculiar to the tricycle. For example, even if a driver sitting on the seat 16 runs on a stepped road, the side frames 14c and 14d of the seat support portion 14, which is a substantially U-shaped frame, are elastically deformed. While absorbing the impact from the road surface, it is difficult for the impact to be transmitted to the driver. Therefore, the electric three-wheeled vehicle 2 does not require the installation of a shock absorbing device that is generally mounted on the vehicle, is excellent in ride comfort, and has good operability.

Moreover, the seat support portion 14 is disposed between the vehicle body 4 and the seat 16 in a substantially U-shape so that the opening 15 faces forward of the vehicle when viewed from the side of the vehicle body. Therefore, the space below the seat 16 (the space indicated by the symbol U in FIG. 2) is large. As described above, when the space U below the seat 16 is wide, there is no obstacle around the legs when the driver gets on and off the vehicle, so that the driver can easily get on and off. In addition, the lower space U can be used as a luggage storage space after the driver gets on the vehicle.

[0017]

[Effect of the invention]

 As described above, according to the electric three-wheeled vehicle according to the first aspect, the vehicle body is formed of a frame frame mainly including a hollow pipe, so that the vehicle body weight is reduced and the rotational driving force of the drive wheel is small. As a result, the size of the electric drive device can be reduced. This makes it possible to provide an electric three-wheeled vehicle that is a vehicle body with a simple frame structure and has a small-sized electric drive device, thereby reducing manufacturing costs.

Further, according to the electric tricycle of the present invention, the seat supporting portion for fixing the seating seat to the vehicle body is formed by a hollow pipe-shaped frame body formed in a substantially U-shape when viewed from the side of the vehicle body. Therefore, even if the driver sitting on the seat is traveling on a stepped road, the hollow pipes that constitute the seat support absorb elastic impacts and absorb impacts from the road. It is difficult to be transmitted. Therefore, it is possible to provide an electric tricycle having excellent ride comfort and excellent operability.

Further, according to the electric three-wheeled vehicle according to the third aspect, the seat support portion is fixed so that the opening in the shape of the letter “U” when viewed from the side of the vehicle faces the front of the vehicle body. Therefore, the operation when the driver gets on and off the vehicle can be easily performed. The lower space can also be used as luggage storage after the driver gets on the vehicle.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an electric tricycle of the present invention.

FIG. 2 is a side view of the vehicle body showing the configuration of the vehicle body and the seat support of the present invention.

FIG. 3 is a plan view showing a configuration of a vehicle body and a seat support of the present invention.

[Explanation of symbols]

 2 electric tricycle 4 body 4a, 4b side member 4c front cross member 4d rear cross member 6 steering shaft 8 drive wheel 8a, 24a gear 10a, 10b driven wheel 14 seat support 14e, 14f upper frame 14a, 14b lower frame 14c, 14d Side frame 14g Cross frame 15 Opening 16 Seating seat 16a Seating portion 16b Connecting pipe 16c Backrest 20 Handle 24 Electric motor 26 Electric storage device 28 Chain

Claims (3)

[Utility model registration claims] 1. A vehicle body, a steering shaft connected to a front side of the vehicle body, and one drive wheel connected to a lower end of the steering shaft and steered by operating a handle provided at an upper end of the steering shaft. And two driven wheels connected to the rear side of the vehicle body, an electric drive device for transmitting rotational driving force to the drive wheels, and a seat seat disposed on the vehicle body via a seat support. An electric tricycle, wherein the vehicle body is formed of a frame having a hollow pipe as a main member. 2. The seat support section is formed of a frame body formed by a hollow pipe formed to have a substantially U-shape as viewed from the side of the vehicle body, and is detachably fixed between the vehicle body and the seat. The electric three-wheeled vehicle according to claim 1, wherein: 3. The electric tricycle according to claim 1, wherein the seat support portion is fixed so that a U-shaped opening as viewed from a side of the vehicle faces forward of the vehicle body.